/*! Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net)
 * Licensed under the MIT License (LICENSE.txt).
 *
 * Version 2.1.2
 */
(function ($) {
	$.fn.bgiframe = ($.browser.msie && /msie 6\.0/i.test(navigator.userAgent) ? function (s) {
		s = $.extend({
			top     : 'auto', // auto == .currentStyle.borderTopWidth
			left    : 'auto', // auto == .currentStyle.borderLeftWidth
			width   : 'auto', // auto == offsetWidth
			height  : 'auto', // auto == offsetHeight
			opacity : true,
			src     : 'javascript:false;'
		}, s);
		var html = "<iframe class=\"bgiframe\"frameborder=\"0\"tabindex=\"-1\"src=\"" + s.src + "\"" + "style=\"display:block;position:absolute;z-index:-1;" + (s.opacity !== false ? "filter:Alpha(Opacity='0');" : "") + "top:" + (s.top == "auto" ? "expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+'px')" : prop(s.top)) + ";" + "left:" + (s.left == "auto" ? "expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+'px')" : prop(s.left)) + ";" + "width:" + (s.width == "auto" ? "expression(this.parentNode.offsetWidth+'px')" : prop(s.width)) + ";" + "height:" + (s.height == "auto" ? "expression(this.parentNode.offsetHeight+'px')" : prop(s.height)) + ";" + "\"/>";
		return this.each(function () {
			if ($(this).children("iframe.bgiframe").length === 0) {
				this.insertBefore(document.createElement(html), this.firstChild);
			}
		});
	} : function () {
		return this;
	});

// old alias
	$.fn.bgIframe = $.fn.bgiframe;
	function prop(n) {
		return n && n.constructor === Number ? n + "px" : n;
	}
})(jQuery);